Add 12/9 and 30/90
1st number: 1 3/9, 2nd number: 30/90
12/9 + 30/90 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
12/9 = 12 × 10/9 × 10 = 120/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
30/90 = 30 × 1/90 × 1 = 30/90 - Add the two like fractions:
120/90 + 30/90 = 120 + 30/90 = 150/90 - 150/90 simplified gives 5/3
- So, 12/9 + 30/90 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+30/90 12/9+60/90 12/18+30/90 36/9+30/90 12/27+30/90 60/9+30/90 12/45+30/90 84/9+30/90 12/63+30/90